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R3D® - MR Magnetel

Magnetoresistive Magnetel® R3D® & Master Dials for LP Gas Service

R3D-MR Magnetel

Application

The Magnetoresistive Magnetel® Dial is a magnetically-driven, voltage output sender. These dials are uti­lized on applications where direct reading plus an electrical signal to a remote fuel level monitor are required. Models are available to fit Rochester 4” & 8” Magnetel® and Taylor 8” Master liquid-level gauges.

General Information & Features

In the area of LP gas measurement, a magnetic drive feature is important because the fluid is stored under pressure. A magnetic drive allows a signal from the float mechanism inside the tank to be transmitted through a solid, non-magnetic bulkhead without the necessity of dynamic seals or
pressure-type conductors.

Previous designs of liquid level gauges for magnetically driven dials which produced an electrical output signal had the disadvantages inherent in using variable resistors with a wiper arm contact. There has been a need for a more reliable and simplified design for these LP gas liquid-level gauges that would provide an electrical output related to the liquid level in the vessel.

Magnetoresistance is a solid state technology with no moving contacts. Magnetoresistance is the property of a material to change the value of its electrical resistance when an external magnetic field is applied. Microchip technology converts the resistance change to a useable voltage signal.

The MR Magnetel® Dial is advantageous in that it can be used as a retrofit on existing vessels to provide an electrical output that can be utilized for remote monitoring of tank levels. With remote monitoring of tank levels, distributors of LP gas will be able to more efficiently plan deliveries to various consumers.

Documents

Data Sheet

WD-575 Control Drawing (available upon request)

DS-1781 Output Voltages

General Specifications*

Temperature

-40°F to 176°F, -40°C to 80°C.

Accuracy

Voltage output ±2% (full scale) of visual dial indication. (Float gauge errors not included.) See DS-1781 for nominal output voltages corresponding with dial graduations.

Operational Voltage Range

4.5v to 5.5v ratiometric.

Resolution

Infinite.

Operating Current

8 mA (No Load).

Output Current

±1 MA.

See WD-575 Control Drawing (available upon request).
See DS-1781 Output Voltages

 

*Materials and specifications are subject to change without notice. Pressure ratings subject to change due to temperature and other environmental considerations.

WARNING! This sensor is not to be used as the primary means of determining high or low fuel condition. It must not be used in the absence of redundant systems in critical applications where there may be significant safety risk or financial exposure in the event of fuel overfill or fuel exhaustion condition. This sensor is not to be used for tank filling.

WARNING! For LP-Gas and other flammable product service applications, connect only to circuits and power sources classified and labeled as Intrinsically Safe for Class 1, Division 1, Group C and D hazardous locations. The connection of non-intrinsically safe power could cause fire or explosion of flammable vapor which may be present.

Materials of Construction*

Lens

Acrylic plastic.

Cover

Acetal plastic.

Bezel

Stainless steel.

Case

Aluminum.

Bezel Screws

Stainless steel.

 

How to Order

Magnetoresistive R3D® Compatible Dial Assemblies
Part Number Size Range Fits Dial
5ANTS03047 4" 5-95%** Rochester Magnetel (M6339) LP & NH3
5APKS03045 4" 5-95%** Rochester Magnetel LP & NH3 Fluorescent
5ANGS03044 8" 3-97% Rochester Magnetel LP & NH3
5ARWS03066 8" 3-97% Rochester Magnetel LP & NH3 Fluorescent
5ANLS03044 8" 3-97% Rochester/ Taylor Master LP & NH3
5ANLS02784 8" 5-95%** Taylor Master LP & NH3
Magnetoresistive Components
Model Style
9701-00054 MR module for 4" & 8" R3D® dials with 3-97% dial graduations

Magnetoresistive components only available through remote monitor OEM's.

R3D-MR modules MET approved as intrinsicaly safe when applied to Rochester monitor.

**Use 3-97% module.

09-12-2017